To provide a method and a content storage server (device), for applying proper meta data for simplifying retrieval or management to video or image content data having no-meta data by a method as user-friendly as possible.

Collation images for recognizing and specifying shooting/on-air time and time information thereof are prepared as a database for collation. Time information of the whole video/image content or a scene is acquired by using the database for collation. The acquired time information is applied to the contents as meta data, which facilitates retrieval or management of the contents.